You can use gsub() to change the names: > dat <- data.frame("Var 1"=rnorm(5, 10), "Var 2"=rnorm(5, 15)) > dat Var.1 Var.2 1 9.627122 14.15376 2 10.741617 16.92937 3 8.492926 15.23767 4 12.226146 15.19834 5 8.829982 14.46957 > names(dat) <- gsub("\\.", "_", names(dat)) > dat Var_1 Var_2 1 9.627122 14.15376 2 10.741617 16.92937 3 8.492926 15.23767 4 12.226146 15.19834 5 8.829982 14.46957
------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of John Sorkin Sent: Monday, June 8, 2015 9:16 AM Cc: r-help@r-project.org Subject: [R] Blank spaces are replaced by period in read.csv, I want to replace blacks with an underline I am reading a csv file. The column headers have spaces in them. The spaces are replaced by a period. I want to replace the space by another character (e.g. the underline) rather than the period. Can someone tell me how to accomplish this?Thank you, John John David Sorkin M.D., Ph.D. Professor of Medicine Chief, Biostatistics and Informatics University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine Baltimore VA Medical Center 10 North Greene Street GRECC (BT/18/GR) Baltimore, MD 21201-1524 (Phone) 410-605-7119 (Fax) 410-605-7913 (Please call phone number above prior to faxing) Confidentiality Statement: This email message, including any attachments, is for th...{{dropped:12}} ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.